322644 has 48 divisors (see below), whose sum is σ = 903168. Its totient is φ = 87648.

The previous prime is 322633. The next prime is 322649. The reversal of 322644 is 446223.

322644 = T₂₈₀ + T₂₈₁ + ... + T₂₈₇.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 322644.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 322644.

It is not an unprimeable number, because it can be changed into a prime (322649) by changing a digit.

322644 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1849 + ... + 2015.

It is an arithmetic number, because the mean of its divisors is an integer number (18816).

2³²²⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 322644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (451584).

322644 is an abundant number, since it is smaller than the sum of its proper divisors (580524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

322644 is a wasteful number, since it uses less digits than its factorization.

322644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 202 counting only the distinct ones).

The product of its digits is 1152, while the sum is 21.

The square root of 322644 is about 568.0176053610. The cubic root of 322644 is about 68.5869037494.

Adding to 322644 its reverse (446223), we get a palindrome (768867).

The spelling of 322644 in words is "three hundred twenty-two thousand, six hundred forty-four".